孟同学（《放学后的小巷》）

孟同学 is one of the student friends in the first [[FangxuehouDeXiaoxiang|《放学后的小巷》]] story discussed in 168.放学后的小巷：致青春，致那年的友谊【日常推理强势回归！！】. He contributes the ten yuan for tofu pudding and egg pancakes, and his modified bicycle becomes one of the story’s key clue objects.

The mismatch between his seven-speed shifter and six-speed wheel set lets [[AliFangxuehou|阿里]] guide him toward a partial theft explanation. That guidance matters because it protects [[YanLiangFangxuehou|严良]] from later direct questioning, turning 孟同学 into both clue carrier and social risk that 阿里 has to manage gently.

Key Claims

• 孟同学’s bicycle part carries the mechanical clue that opens the mystery.
• His willingness to accept a plausible explanation helps 阿里 avoid exposing 严良.
• His role shows how [[DailyLifeMystery|日常推理]] can depend on ordinary group interaction, not only solitary genius.

Connections

• [[FangxuehouDeXiaoxiang|《放学后的小巷》]] - story context.
• [[AliFangxuehou|阿里]] and [[YanLiangFangxuehou|严良]] - first-story friend group.
• [[DailyLifeMystery|日常推理]] - genre frame.
• [[DignityProtectingDeduction|体面保护式推理]] - social handling of the clue.